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    v1.0.28
    OpenPayerBilling CodesAmbulance and Other Transport Services and SuppliesHCPCS hcpcs-a0434-specialty-care-transport
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    HCPCS Level II A0434: Specialty Care Transport (SCT)

    Commercial payers pay $956 on average nationally for this procedure.

    HCPCS Level II code A0434 represents Specialty Care Transport (SCT), an ambulance transport service for patients requiring specialized medical care en route that cannot be provided in a standard ambulance; the service type is specialty interfacility ambulance transport, and the typical site of service is ambulance/ground transport between healthcare facilities.

    For related coverage guidance, see recent payer policy updates: Dialysis Services (ESRD) Coverage and Provider Requirements, Total Parenteral Nutrition and Intradialytic Parenteral Nutrition, End Stage Renal Disease (ESRD): Renal Dialysis.

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    National Reimbursement Benchmarks

    Across national commercial payers, BUCA’s average commercial rate of $956.30 serves as a practical benchmark for HCPCS A0434, with individual carriers clustering around that midline but with notable differences in dispersion. Blue Cross Blue Shield (BCBS) and UnitedHealth Group both show wider spreads between the 25th and 75th percentiles — BCBS has a P25–P75 range of $470.10 ($1,219.60 − $755.50) and UnitedHealth Group shows a range of $238.60 ($933.30 − $694.70) — indicating greater variability in contracted levels. Cigna and Aetna are comparatively tighter around their central tendencies; Cigna’s P25–P75 range is $318.30 ($907.20 − $568.90) while Aetna’s is very narrow at $7.80 ($921.80 − $921.00).

    Payer medians and means cluster between roughly $569 and $1,125, with Cigna’s median at $568.90 and BCBS’s mean elevated by high maximums to $1,125.20, while BUCA’s mean remains near the group center at $956.30. The contrast between BCBS’s large interquartile spread and Aetna’s minimal spread highlights pockets of high variability versus tight contracting across carriers, and UnitedHealth Group also exhibits meaningful dispersion relative to its median of $769.00.

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    National Payer Mean Reimbursement Rates

    State Reimbursement Rates

    State: Alaska1 / 51

    Rate by payer

    Clinical & Coding Specifications

    Clinical Context

    A typical patient scenario involves an adult admitted to a community hospital emergency department with acute chest pain and shortness of breath. On initial evaluation the patient is hemodynamically unstable, oxygen saturations are low, and the emergency medicine physician documents concern for acute myocardial infarction (I21.9) with possible acute respiratory failure (J96.00). The ED team determines the patient requires higher-acuity care at a tertiary center with specialty cardiology and respiratory ICU resources. A specialty care transport is arranged to transfer the patient by ground ambulance staffed with a paramedic and a critical care-trained clinician able to provide advanced monitoring, ventilator management, and cardiac interventions during transfer.

    The clinical workflow: the sending ED documents the indication for transfer, stabilization measures performed (oxygen, intravenous access, medication administration, cardiac monitoring), and a destination acceptance by the receiving cardiology/critical care service. The ambulance service assigns a crew with appropriate licensure and equipment, records start and end transport times, documents interventions performed en route (advanced airway, vasopressor infusion, ECG monitoring, medication titration), and includes the sending facility transfer summary and physician-to-physician acceptance note. Billing uses HCPCS Level II code A0434 for the specialty care transport, and associated mileage and advanced life support codes are appended as appropriate. Clinical documentation must support the higher-acuity skill set and resources required during the transfer, including interventions consistent with the listed ICD-10 diagnoses such as R07.9, I21.9, or J96.00.

    Related CPT Codes

    Related Modifiers

    8 rows

    ModifierDescriptionWhen to Use
    22Modifier –22 (Increased Procedural Services) is used when a reported procedure is substantially more extensive than normally required. The CPT Manual and CMS state it may be appended only when the…- When to use: Append modifier -22 to a procedural CPT code when the service performed is substantially more extensive than the usual service described by that code — i.e., the procedure required…
    23Modifier -23 (Unusual Anesthesia) is used on anesthesia service CPT codes when a procedure that normally requires no anesthesia or only local anesthesia must be performed under general anesthesia…- Use modifier -23 only on anesthesia CPT codes (00100–01999) when a procedure that normally requires no anesthesia or only local anesthesia must be performed under general anesthesia because of…
    52Modifier ‑52 (Reduced Services) indicates that a service or procedure was partially reduced or omitted at the provider’s discretion, allowing reporting of the basic procedure number with a qualifier…- Use modifier -52 when a physician or qualified health professional electively reduces or omits part of a procedure or service (for example, performing fewer required views or omitting a portion of…
    53Modifier 53 (Discontinued Procedure) signals that a surgical or diagnostic service was begun by the physician but terminated because of extenuating circumstances that threatened the patient’s…- Use modifier -53 when a physician/qualified healthcare professional has started a surgical or diagnostic procedure (e.g., anesthesia administered, incision or scope insertion) and then discontinues…
    59Modifier 59 indicates a distinct procedural service when two procedures that are not normally billed together are clinically and procedurally separate. The CPT definition (as reiterated by CMS)…- Use modifier -59 to report a distinct procedural service when documentation supports that the procedure reported is not normally billed together with another service on the same day because of a…
    76Modifier -76, Repeat Procedure or Service by Same Physician or Other Qualified Health Care Professional, is appended when the same provider performs an identical, medically necessary procedure or…- Use modifier -76 when the same physician or other qualified health care professional performs an identical procedure or service a second (or subsequent) time on the same date of service and the…
    78CPT modifier -78 indicates an unplanned, related return to the operating or procedure room by the same provider during the global postoperative period. It is appended when treatment for a…- Use modifier -78 when an unplanned, related complication during the original procedure’s global postoperative period requires the patient to return to a formal operating or procedure room and the…
    80CPT® Modifier 80 (Assistant Surgeon) is appended to a surgical CPT code when a physician (MD or DO) provides full, continuous assistance throughout the operative procedure. It is intended only for…- Use CPT Modifier -80 when a physician (MD or DO) serves as an assistant surgeon and provides full, continuous assistance throughout the entire operative procedure; append -80 to the surgical CPT…

    Related Provider Taxonomies

    8 rows

    Taxonomy CodeSpecialtyNotes
    146L00000XParamedicAn EMT, Paramedic is an individual trained and certified to perform advanced life support (ALS) in medical emergencies based on individual state board…
    146D00000XPersonal Emergency Response AttendantIndividuals that are specially trained to assist patients living at home with urgent/emergent situations. These individuals must be able to perform C…
    207P00000XEmergency Medicine PhysicianAn emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospit…
    103TW0100XDeactivated - Psychotherapy Women
    207X00000XOrthopaedic Surgery PhysicianAn orthopaedic surgeon is trained in the preservation, investigation and restoration of the form and function of the extremities, spine and associated…
    2086X0206XSurgical Oncology PhysicianA surgical oncologist is a well-qualified surgeon who has obtained additional training and experience in the multidisciplinary approach to the prevent…
    2081P0004XSpinal Cord Injury Medicine PhysicianA physician who addresses the prevention, diagnosis, treatment and management of traumatic spinal cord injury and non-traumatic etiologies of spinal c…
    246RH0600XHistology TechnicianTechnologists, Technicians & Other Technical Service Providers · Technician, Pathology

    Related Payer Policy Updates

    Specialty: Dialysis/Renal Replacement1 / 3

    10 rows

    PolicyPayerEffective Date
    Dialysis Services (ESRD) Coverage and Provider RequirementsMississippi Division of Medicaid2026-08-01
    Total Parenteral Nutrition and Intradialytic Parenteral NutritionCentene2026-05-01
    End Stage Renal Disease (ESRD): Renal Dialysispriority health2026-02-01
    Home Hemodialysis (HHD) — Coverage CriteriaUnitedHealthcare2026-01-01
    Home Hemodialysis (HHD) Coverage Criteriasierra health and life2026-01-01
    Dialysis services (acute and chronic hemodialysis and peritoneal dialysis)UnitedHealthcare2026-01-01
    Staff-Assisted Home HemodialysisCigna2025-11-15
    Parsabiv (etelcalcetide) Coverage for Secondary HyperparathyroidismMolina Healthcare2025-10-09
    DefenCath (taurolidine/heparin catheter lock) CoverageMass General Brigham Health Plan2025-09-01
    Medical Necessity Guidelines — DefenCath (taurolidine/heparin) catheter lockMass General Brigham Health Plan2025-09-01

    Related Codes

    HCPCS-A0021-AMBULANCE-SERVICE-OUTSIDE-STATE-PER-MILE-TRANSPORT

    HCPCS A0021: Ambulance Service Outside State Per Mile, Transport (Medicaid Only)

    HCPCS-A0080-VOLUNTEER-NON-EMERGENCY-TRANSPORTATION-MILEAGE

    HCPCS Level II A0080: Non-Emergency Volunteer Vehicle Transport, Per Mile

    HCPCS-A0090-NON-EMERGENCY-TRANSPORTATION-MILE-PRIVATE-VEHICLE

    HCPCS A0090: Non-Emergency Transportation, Per Mile

    HCPCS-A0100-NON-EMERGENCY-TAXI-TRANSPORTATION

    HCPCS A0100: Non-Emergency Transportation, Taxi

    HCPCS-A0110-NON-EMERGENCY-BUS-TRANSPORTATION

    HCPCS Level II A0110: Non-Emergency Bus or Carrier Transportation

    HCPCS-A0120-NON-EMERGENCY-MINI-BUS-TRANSPORTATION

    HCPCS Level II A0120: Non‑Emergency Transportation by Mini‑Bus or Mountain Transport

    HCPCS-A0130-WHEELCHAIR-VAN-NON-EMERGENCY-TRANSPORTATION

    HCPCS Level II A0130: Non-Emergency Transportation, Wheelchair Van

    HCPCS-A0140-NON-EMERGENCY-AIR-TRANSPORTATION

    HCPCS Level II A0140: Non-Emergency Transportation and Air Travel

    HCPCS-A0160-NON-EMERGENCY-TRANSPORTATION-CASE-WORKER-SOCIAL-WORKER-PER-MILE

    HCPCS Level II A0160: Non-Emergency Transportation by Case Worker

    HCPCS-A0180-ANCILLARY-LODGING-NON-EMERGENCY-TRANSPORTATION

    HCPCS Level II A0180: Non-Emergency Transportation Lodging-Recipient

    Showing 1–10 of 40

    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
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    CPT CodeDescriptionRelationship to This Procedure
    A0425Ground mileage, ambulance serviceBilled in addition to A0434 to report transport distance for the specialty care transfer.
    A0433Advanced life support, level 2 (ALS2)Billed when advanced life support interventions beyond basic life support are performed during the specialty care transport; documents higher acuity clinical care provided en route.